Incandescent gas-lamp.



T. J. LITLE, JR- INGANDESGENT GAS LAMP.

APPLICATION IILBD JULY 15, 1910.

Patented June 30, 1914.

3 SHBETSSHEET l.

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T. J. LITLE, JR.

INGANDESGENT GAS LAMP.

APPLICATION FILED JULY 15, 1910.

1,101,863, Patented June 30, 1914.

f, 2 3 SHEETS-SHEET 2.

T. J. LITLE, JR. INOANDESGENT GAS LAMP.

APPLICATION FILED JULY 15, 1910.

1, 101,863, Patented June 30, 1914.

3 SHEETSSHBET 3.

mam" III-Ill] ll I III INVENTOR K. @mxv 7 WMYQOMJMQM. A i n UNITED STATES PATENT OFFTCE.

THOMAS JAMES LITLE, JB., OF WOODBURY, NEW JERSEY, ASSIG-NOR T'O WELSBACH LIGHT COMPANY, OF GLOUCESTER CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

INCANDESCENT GAS-LAMP.

Specification of Letters Patent.

Application filed July 15, 1910.

Patented J une 30, 1914.

Serial No. 572,190.

7 To all whom it may concern Be it known that I, THOMAS J. LITLE, Jr., resident of lVoodbury, Gloucester county, New Jersey, have invented a new and useful Incandescent Gas-Lamp, of which the following is a full, clear, and exact description, reference being had to the accompanyingdrawing's, forming part of this specification, in which Figure 1 is an elevation of a lamp embodying my invention; Fig. 2 is a vertical section of the same; Fig. 3 is a top plan view; Fig. 4 is a detail view showing the valve actuating devices; Fig. 5 is a detail View showing a latch or retainer for the gauze device; Fig. 6 is a detail view of the gauze device removed; and Fig. 7 is adetail view of my preferred form of gauze cartridge.

My invention has relation to incandescent gas lamps, and more particularly to lamps of the manifold inverted type.

The invention is designed to provide a novel construction and arrangement of the mixing tube, and also of the burner tubes, whereby a largely increased efiiciency is obtained.

The invention also provides means of novel character for centering the gas jet tube with reference to the mixer tube; also a novel arrangement of air regulating device or shutter, which is operated in conjunction with the gas valve to give a rich mixture of gas in lighting the lamp, thereby preventing flash-backs, and also giving a rich mixture when the valve is closed, thus preventing explosions in the manifold chamber which would injure the mantles.

Other objects of my invention and novel features thereof will hereinafter appear.

Referring to the accompanying drawings, the numeral 2 designates the casing of the lamp, which is provided with the vertical chimney portion 3, forming an extension of the lower chimney section 1 which is secured within the lower portion 'of the casing. This casing may be of any desired ornamental form. It is shown as having outwardly flared upper and lower portions 2 and 2 which are suitably beaded and ornamented. 5 designates the globe-holding ring, which is secured to the lower portion of the casing in any suitable manner, such as indicated at 7 and 8. The globe holder, however, and the means of securing the same, form no part of the present invention.

.9 designate the globe.

10 is the gas supply pipe having a vertical arm which leads centrally to the top of the chimney 3 into the upper portion of which it extends, and is then bent outwardly as shownat 10 and extends radially across the chimney and through a slot or opening in the upper edge portion of the same. It is then carried downwardly as shown at 10 through a slot 11 in the casing portion 2% The lower end of the portion 10 is connected to a valve casing 12.

13 is a valve spindle, carrying a suitable valve 14 within said casing.

15 is the gas jet tube, which is connected to the outlet of the valve chamber, and

mixing tube 16. The valve stem 13 has rigidly secured to it a ratchet 17 which is arranged to be operated by the pawl end 18 of an actuating lever 19. This actuating lever has a loose pivotal connection at 20 with a plate 21, which is loosely mounted on the valve spindle, and which is provided with a projection 22 extending loosely through a slot 23 in the actuatingarm of the lever 19. A spring 24' is coiled around the end portion of the spindle, one end of thi spring engaging the projection 22, as shown at 25, and the other end extending over a pin or arbor 26, and terminating adjacent to the periphery of the ratchet 17 to engage the teeth thereof and form a stop for holding the ratchet against back movement after it has been actuated. The plate 21 hasa projecting stop arm 27, which is arranged to engage the pin or arbor 26, and limit the upward movement of the lever 19; and also has another projecting arm 28, which is designed to engage one arm of a lever 29 (as best seen in Fig. 1),

The other arm of this lever is engaged with the bent arm 31 of an air shutter device 32, which is arranged to reciprocate within the upper open end of the mixing tube 16.

The lever 19 is normally held in its upward position, shown in Figs. and 4: by

which extends into the upper end of the r which is pivoted at 30 to the valve casing.

W ten the tension of the spring 2d. The valve being closed, a. downward movement of said lever causes its pawl to engage the ratchet l7 and thus rotate the valve stem sutliciently to open the valve. At the same time the lever engages the arm of the lever 29 and raises the shutter 32 so as to partially close the entrance of air to the mixer tube, thus giving a. rich mixture in starting, which pre vents flash-backs. As soon as the lever is released, the spring returns to its former position; the end 01 the spring 24. engages a tooth of the ratchet and holds the valve in its open position, and the projection 28 or the plate 21 engages the under side of the lever 29 to insure the movement of the shutter back to its normal lowered position, and to hold it in such position. The next operation of the lever will operate the ratchet another step to close the valve, the shutter being again raised, giving a rich mixture to prevent explosion in the 1nani fold. The end of the valve stem is preterably provided with a double pointer 33, which by its position will indicate whether the valve is open or closed.

F or the purpose of adjusting the normal position of the shutter to control the amount of air entering the mixing tube, I provide the Listing screw 3%, which engages the bent arm 31 of the shutter and thereby determines its normal lowered position with respect to the upper end or" the mixing tube.

it is Off considerable importance that the end or": the gas supply or jet tube shall be directed axially into the mixer tube and properly centered, so as to entrain the proper amount of air. For this purpose, I form said tube .in two parts, the upper part designated at 15 having a threaded bearing in its outer end for the usual needle valve 35, and the lower end portion having a flange l5 which. is arranged to seat against the outwardly turned and overhung end lo of the mixer tube. This outwardly turned and overhung end has a perforation to receive a boss or projection 15 of the up] er section 15 of the jettubc, and which projection is exteriorly threaded. The lower member 15 ot' the tube, which has an orifice therein for the point of the needle valve, in the form of a. nut, having an internal thread to engage the externally threaded boss 15. By this construction the jet tube may be accurately centered with respect to the mixing tube.

The mixing tube extends obliquely downward and inward through an opening in the side ot the chimney portion 3 ot the casing, being of gradually enlarging crosssectional area toward its lower end, which opens into and carries the centrally located manifold 36. The increasing area of the mixing tube toward its lower and provides for the expansion of gas and air as it becomes heated, and has been found to very greatly increase the etliciency of the lamp.

37 designates burner tubes, of which any desired number may be employed, and which are connected to the manifold. Thee tubes are preferably of decreasing cross sectional area toward their lower ends, and are made of considerable length, their lower ends being su'liiciently below the bottom wall of the manifold chamber to prevent undue heating thereof. The manifold 36 is provided with an interior chamber 36 of sul'licient area to provide for thoroughly mixing of the gas and air before it passes to the burner tubes. The contracting area. of the burner tubes toward their lower ends prevent flashbacks. 88 designates the usual mantles ot the inverted type.

[Another feature of my invention consists in the novel arrangement of the inpedance which is interposed in the mixing tube. .lleretofore these impedances, usually in the form of wire gauze, have been permanently secured in place. 'lheycannot be removed or changed without disturbing the burners and detaching the parts.

My invention provides the highly desirable feature of ready removal and replacing of the impedance, not only for cleaning, but especially for changing the gauze to suit the different characters of gas in dillerent districts. lvly invention not only provides for ready removal of the impedance without disturliing the burners or detaching the parts; but also for adjustment of the im pedance so as to cover the area of the burner tube or any desired part of it. In the preferred form, it also provides for adjusting the impedance to give more or less impedance as desired.

In the form shown in Fig. (3, the imped ance takes the form of a cylindrical screen 39, which is secured between a head or disk 4-0 at its inner end and extending into a cylinder 41 at its outer end which is arranged to be moved over the screen or impedance to vary the length of its exposed portion. This cylinder has a closed outer end provided with a bearing for a screw 42, whose inner end engages the head elO. To receive this screen and cylinder, the lamp is termed with an opening leading to one side of the lamp and cut through the lower portion of the lower casing section 2 the wall of this open ing being tforn'ied by tube 43 which secured at its inner end to the upper portion of the manifold. The outer end of the screw 42 is provided with a thumb piece 44-.

4-5 is a latch or retainer, which is pivoted to the portion 2 of the casing, and which,

normally hangs in a position to prevent the complete withdrawal of the screen impedance from the lamp. (Sec 5.)

The screen impedance can be readily re moved when lesircd, and a new one inserted with a difl'erent mesh of gauze to suit the particular quality of gas being used. The gauze can be inserted into the position shown in Fig. 2 so as to extend completely across the lower portion of the mixing tube where it enters the manifold, or it may be withdrawn to any desired extent, depending upon the explosive quality of the gas. By turning the screw 12, the gauze may be moved into and out of the cylinder 11 to throttle the passage through the gauze to a greater or less extent.

In Fig. 7 I show another and preferred form of the screen impedance and cooperating parts. is provided with a receiving pocket 52 opposite to and in line with the cartridge tube 13*, said pocket and cartridge tube forming opposite side extensions or" the mixing tube. In this case the gauze 39 is of double length,

one part being of coarser mesh than the other. By sliding the screen impedance, the coarser mesh can be brought in line with the tube, or the finer mesh in line with the tube, or a portion of either or a portion of both into this line. I thus provide a single impedance which can be used for diiierent qualities of gas, thus reducing the number of impedances to be carried by the tube in installing the lamps.

The tube 13 forms a support or bracing connection for the manifold to hold it centrally within the lower portion of the chimney, and this is further centered by a bracing connection 16 at the opposite side of the manifold, which is engaged by a screw 46 extending through the chimney section 4.

The horizontal arm 10 of the gas supply tube may be arranged as shown to form one arm of a spider, having other radial arms 17 (see Fig. 3), which support the chimney, the

arm 10 of the supply tube having a flange 48 which is firmly secured by screws or other means to the chimney.

49 designates a pilot light supplied by the tube 50 having the regulating screw 51.

My invention provides a highly efiicient and convenient form of lamp, possessing the advantages above specified, and also numerous other advantages, such as simplicity of construction, convenience of operation, and high light efiiciency.

It will be obvious that various changes may be made in the details of construction and arrangement of the parts without departing from the spirit and scope of my invention as defined in the appended claims.

It will be evident that any desirable form of impedance may be used, whether solid or foraminous or whether made of gauze, or rods, or in any other desirable form.

I do not specifically claim herein the gas and air mixer shown and described, as the same forms the subject matter of my Patent No. 1,031,013, dated July 2, 1912.

In this case, the mixing tube 16 What I claim is 1. A gas lamp having a chimney, a casing exterior of the chimney, a mixing tube, said mixing tube having at its lower end a burner manifold permanently connected thereto and carried by said tube, the tube extending upwardly at an angle to the manifold and outwardly through one side of the chimney to a point exterior of the lamp casing and means for securing the mixing tube to the chimney and casing, substantially as described.

2. In a gas lamp, a mixing tube having a sidewise removable perforated impedance arranged to be inserted in a lateral direction across the opening through said tube, and a slide arranged to be adjusted across said impedance; substantially as described.

3. A gas lamp having a casing, a mixing tube having a cylindrical perforated impedance, an adjusting device extending through the side of the lamp casing arranged to move said impedance in a longitudinal direction and at right angles to the mixin tube substantially as described,

4:. A gas lamp having a casing provided with a side opening, a mixing tube having a side opening in line with the side opening in the casing, and a perforated cylindrical impedance arranged to slide within said openings; substantially as described.

5. A gas lamp having a casing, a mixing tube, a tube extending from the mixing tube through the side wall of the casing, and a perforated impedance within the mixing tube arranged to be removed through the tube extending from the mixing tube, substantially as described.

6. In a gas lamp, a casing provided with a side opening, a mixing tube having a side opening in line with the side opening in the casing, a tube extending through both openings, an impedance removable therethrough, said impedance having portions of different impeding resistance; and means for adjusting one portion of the impedance with relation to the other portion; substantially as described.

7. As a new article of manufacture, a perforated cylindrical impedance device having telescopic members of different impeding resistance arranged to be inserted in a lamp, and a centrally disposed adjusting member connected to said telescopic members arranged to adjust one of said members relative to the other; substantially as described.

8. As a new article of manufacture, an impedance device having two portions of difierent resistance characters, and a. screw stem for engaging both portions for adjusting one portion with relation to the other portion; substantially as described.

9. As a new article of manufacture, an impedance device having portions of ditlerent resisting characters connected to each other by an adjusting screw and arranged to be adjusted with relation to each other to vary the impedance; substantially as described.

10. A gas lamp having a mixing tube, a manifold at the lower end of said tube, and a game cylinder arranged to extend across the mixing tube Where it opens into the manifold, the axis of the mixing tube being approximately at right angles to the longitudinal center of the gauze cylinder, said gauze cylinder being removable at the side of the lamp; substantially as described.

11. In a gas lamp, a mixing tube having opposite side extensions, and a removable impedance arranged to slide within said extensions across the mixing tube; substantially as described.

12. In a gas lamp, a mixin tube, having opposite side extensions, and a movable impedance arranged to slide within said extensions across the mixing tube, said impedance having portions of different impeding resistance; substantially as described,

13. In a gas lamp, a m1x1ng tube extending obliquely downward and inward through an opening 111 the side of the chimney :bove;

the lamp casing, said mixing tube having an overlumg upper end portion on the exterior of the lamp, and a sup 'ily tube or secured. and centered to and in said over-g hung end portion; substantially as described.

ii. A gas lamp having a chimney, a S ing on the exterior of the chimney, mixing tube, said mixing tube having at its lower end a burner manifold permanently connected thereto and carried by said tube, the tube extending upwardly at an angle to the manifold and outwardly through one side of the chimney to a point exterior of the lamp casing, and bracing connections between the mixing tube, the chimney and easing adia cent to the li'lfllllfOld; substantially as described.

15. A lamp having a chimney, a mixing tube, said mixing tube having at its lower end a burner manifold permanently connected thereto and carried by said tube, the tube extending upwardly at an angle to the manifold and outwardly through one side of the chimney to a point exterior of the lamp casing and bracing connections between the mixing tube and the chimney adjacent to the manifold, one of said bracing connections being hollow to form a guide for an impedance device; substantially as described.

16. A gas lamp having a mixing tube extending downwardly within its chimney and tcrn'iinating at its lower end in a manifold, said mixing tube having adjacent to the manifold, a lateral opening, there being an opening through the chimney in line with the opening in the mixing tube and a screen menses impedance removable through said openings; substantially as described.

17. A gas lamp having a mixing tube provided with a burner manifold at its lower end, said tube having a lateral opening adjacent to the manifold, a tube secured in said opening and extending laterally to the exterior of the lamp casing, and an im pedance insertible and removable through said tube; substantially as described.

18. A gas lamp having a globe or shade support, a gas supply passage for its burner, a chimney, there being a laterally directed opening communicating with said passage above the said support, and a screen insertible into and removable from said opening without disassembling the burner and without removing the globe or shade; substantially as described.

195A gas lamp having a burner, a gas supply passage leading to the burner, there being a laterally directed opening leading to said passage, a tube in, said opening and a cylindrical screen within said tube; substantially as described.

20. In a lamp, the combination of a chimney, a burner tube adapted to receive a. screen or impedance, said chimney and tube having openings therein through which the screen or impedance may be inserted or removed without disassembling the burner, and a screen or impedance adapted when in operative position to close the opening in the burner against the escape of {Ins thcrethrough; substantially as described.

21. In a gas lamp, the combination of a chimney, a burner tube to receive a screen or impedance and having an opening therethrough, a screen supporting device extending from the opening in the chimney to the opening in the burner, and a screen or impedance within the supporting device arranged to be inserted or removed without disassembling the burner; substantially as described.

22. A gas lamp having a chimney provided with a side opening, a gas supply passage for the lamp burner having a side opening in alinement with said opening in the chimney, and a perforated impedance arranged to slide through said openings; substantially as described.

A gas lamp having a chimney provided with a side opening, a burner having a side opening in alinement with said opening in said chimney, and a remo 'able screen adapted to be inserted or removed through said openings.

94-. A lamp having a mixer tube, a manifold into which the mixer tube leads, a plurality of burner tubes connectca'l to the manifold, and a perforated impedance located in the flow channel for the mixture above the burner tubes and through which the mixture flows to the burner tubes, said impedance being removable without disassembling the manifold 01' burner tubes; substantially as described.

25. In a gas lamp, a mixer tube and burner tube, said lamp having a special opening into the flow channel for the mixture, and a hollow screen impedance removable through said special opening and arranged to cause the mixture to flow through its peripheral wall when in operative p0sition; substantially as described.

26. A gas lamp having a mixer tube, a manifold into which the mixer tube leads, burner tubes leading from the manifold, said parts having a special opening leading into the common flow channel for the mixture and accessible when the parts are in operative position, and a cylindrical foraminated impedance controlling the flow of gas and air mixture into the manifold and removable through said special opening Without disturbing said parts; substantially as described.

27. A gas lamp having a mixer tube, a manifold into which the mixer tube leads, burner tubes extending from the manifold, said parts having a special opening leading into the flow channel for the mixture, a closure for said opening and a cylindrical foraminated impedance controlling the flow of gas and air mixture into the manifold and removable through said special opening without disturbing said parts; substantially as described.

In testimony whereof, I have hereunto set my hand.

THOMAS JAMES LITLE, J n. Witnesses:

JOSEPH H. JOHNSON, R. B. VVAsHINeroN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

